T38 button bit 76mm (3') retract drop center
T38 3' retract button bitsdrop center spherical buttons are fully interchangeable with rock drilling rods manufactured by Atlas Copco, Sandvik, Boart Longyear etc. 1) Thread: T38. 2) Diameter: 76mm (3'). 3) Material: 45CrNiMoV,YK05. 4) Advanced heat treatment technology.
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